460 Scientific Intelligence. 
12. Objections to the views of Mr. Moon on the measure of 
work ; R. J. Apcocx. (Editorial Correspondence.)—In the 
engineers, and in modern school text books,—for instance Profes- 
sor Bartlett’s Mechanics, Prof. Moseley’s Engineering and Archi- 
tecture,—which objections unanswered in your Journal might 
retard the advancement of science. 
e time depends up 
the mass moved and upon its initial velocity, in the case of free 
motion, and may have any values. : 
Paragraphs (2) and (3) are correct, except that he calls V a 
variable quantity, after having assumed it as one of the arbitrary 
constants. (4) is objectionable for using the term work in a sense 
fferent from the received one, and for affirming that the reason- 
ableness of a conclusion would be difficult to establish after having 
just given the proof of it. 
straight or curved, and what- 
ever be the time of motion,—there can be no valid objection. 
, when understood, is merely an 
example of the application of the principle. 
Lenox, Warren County, Illinois, October 18th, 1873. 
